import urllib.request
import os
import random


def url_open(url):
    req=urllib.request.Request(url)
    req.add_header('User-Agent','Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36')

    proxise=['122.237.106.131:80','119.5.1.28:808','119.4.15.154:1133']
    proxy=random.choice(proxise)

    proxy_support=urllib.request.ProxyHandler({'http':proxy})
    opener=urllib.request.build_opener(proxy_support)
    urllib.request.install_opener(opener)
    

    response=urllib.request.urlopen(url)
    html=response.read()


    return html

def get_page(url):
    html=url_open(url).decode('utf-8')

    a=html.find('current-comment-page')+23
    b=html.find(']',a)

    return html[a:b]
    
    
def find_imgs(url):
    html=url_open(url).decode('utf-8')
    img_addrs=[]

    a=html.find('img src=')
    while a!=-1:
        b=html.find('.jpg',a,a+255)
        if b!=-1:
            img_addrs.append(html[a+9:b+4])
        else:
            b=a+9

        a=html.find('img src=',b)


    return img_addrs


def save_imgs(folder,img_addrs):
    for each in img_addrs:
        filename=each.split('/')[-1]
        with open(filename,'wb') as f:
            img=url_open(each)
            f.write(img)

def download_mm(folder='ox',pages=10):
    os.mkdir(folder)
    os.chdir(folder)

    url='http://jandan.net/ooxx/'
    page_num=int(get_page(url))

    for i in range(pages):
        page_num -= i
        page_url=url+'page-'+str(page_num)+'#comments'
        img_addrs=find_imgs(page_url)
        save_imgs(folder,img_addrs)


if __name__=='__main__':
    download_mm()
    
    
